1,3-二甲基尿嘧啶(1),用于合成各种杂环的通用合成子,在乙醇钠中容易与3-氨基吡唑2反应,得到吡唑并[1,5- a ]嘧啶3。在相似的条件下,3-氨基吡唑C-核苷4和合成子1得到吡唑并[1,5- a ]嘧啶C-核苷的混合物,将其在硅胶柱上分离。尝试去除保护基产生吡喃糖衍生物10。另一合成子1,3-二甲基-5-氮杂嘧啶和3-氨基吡唑12生成吡唑并[1,5- a ]三嗪13。在与3-氨基吡唑C-核苷4的类似反应中,得到相应的吡唑并[1,5- a ]-三嗪C-核苷14和15。
[EN] AMIDO-SUBSTITUTED CYCLOHEXANE DERIVATIVES<br/>[FR] DÉRIVÉS DE CYCLOHEXANE À SUBSTITUTION AMIDO
申请人:BAYER PHARMA AG
公开号:WO2016177658A1
公开(公告)日:2016-11-10
The present invention relates to amido-substituted cyclohexane compounds of general formula (I), in which A, R4, R6, R7, R8, R9, R10 and R11 are as defined herein, to methods of preparing said compounds, to intermediate compounds useful for preparing said compounds, to pharmaceutical compositions and combinations comprising said compounds and to the use of said compounds for manufacturing a pharmaceutical composition for the treatment or prophylaxis of a disease, in particular of neoplasms, as a sole agent or in combination with other active ingredient.
Synthesis of Pyrazolo[1,5-α]pyrimidinone Regioisomers
作者:Lori K. Gavrin、Arthur Lee、Brian A. Provencher、Walter W. Massefski、Stephen D. Huhn、Gregory M. Ciszewski、Derek C. Cole、John C. McKew
DOI:10.1021/jo062120g
日期:2007.2.1
work describes two distinct routes to prepare pyrazolo[1,5-α]pyrimidin-7-ones and two distinct routes to prepare pyrazolo[1,5-α]pyrimidin-5-ones. Use of 1,3-dimethyluracil as the electrophile in the preparation of the pyrimidin-5-one regioisomer represents a correction of previously reported results. Also, a novel reaction to prepare this isomer was identified and the reaction mechanism elucidated. This